Founding Full Stack Software Engineer (Backend/AI Focus)

Location: Los Angeles, CA (100% On-site)

Compensation: $170,000 - $225,000 (Base Salary) + Significant Equity

We are an early-stage, YC-backed company building fully autonomous AI agents powered by in-house models that can find, exploit, and patch complex vulnerabilities in web applications at massive scale. We are seeking a passionate Founding Full Stack Software Engineer to build and scale the core systems. This is a high-impact role with a focus on backend architecture and AI agent systems, directly addressing the speed and scale challenges posed by AI-generated code.

As a Founding Engineer, you will have significant responsibility for designing, developing, and maintaining our scalable, high-performance web applications and cutting-edge AI Agent systems. Your focus will be on the backend and AI components.

Key Responsibilities:

Founding Engineer

Location: New York City, NY (100% On-site)

Compensation: $150,000 - $250,000 (Base Salary) + Significant Early-Stage Equity

We are an early-stage, YC-backed company building the future clean data layer for the internet, starting with financial firms. Our platform solves complex data cleaning, extraction, and validation problems by combining advanced AI (LLMs) with expert human review via a simple API. We're looking for a highly capable and driven Founding Engineer to join us and help build the core of our platform from the ground up. This role offers an opportunity for the right candidate to grow into a CTO-level position.

As a Founding Engineer, you will take ownership of critical systems that drive our product, working across the entire stack. You will directly influence our product strategy and technical direction, experiencing the full arc of building a successful startup.

What you'll do:

Location: New York, NY (100% On-site)

Compensation: $150,000 - $200,000 (Base Salary) + Competitive Equity

We are a rapidly growing, well-funded technology company operating at the intersection of AI, data, and life sciences. Our mission is to accelerate the path for patients to receive life-changing therapies by simplifying insurance, affordability, and pharmacy supply chain complexities. We are seeking a high-impact Analytics Engineer to build the data foundation that powers how we operate, measure, and grow.

As an Analytics Engineer, you'll be an owner of our data infrastructure, ensuring that clean, trustworthy, and decision-grade data is available across the company. This is a highly autonomous, cross-functional role that directly impacts company growth and client success.

If you join, you will:

Software Engineer (New Grad - Construction Tech Platform)

Company: Agave (YC W22)

Location: San Francisco, CA (FiDi)

Employment Type: Full-time

Work Arrangement: On-site 5 days a week

About the Role

Our client is a well-funded, profitable YC-backed startup (YC W22) modernizing the $12 trillion global construction industry. They solve a massive problem: connecting fragmented, siloed software systems—many of which are 20-40 years old, on-prem, and lack modern APIs. They build proprietary APIs to connect these systems and wrap them in a modern UI to automate critical work, like syncing financial data between job sites and accounting offices. The company has over 200 paying customers, is cash-flow positive, and is backed by investors like Accel and leaders from Procore and Autodesk.

They are seeking a world-class New Grad Software Engineer who loves simplifying complex systems, unifying fragmented data, and building high-scale backend systems. This role offers high ownership and the chance to work on unique technical challenges that exist at the intersection of old-school enterprise and modern cloud infrastructure.

What You'll Be Doing (Interesting Technical Challenges)

Software Engineer (Early Team Member)

Location: San Francisco, CA (On-site)

We are a rapidly growing, well-funded startup building an innovative AI-powered productivity tool for professional teams. We help users capture, organize, and utilize insights from their daily conversations, making every meeting more valuable. You'll be joining a small, high-impact team of experienced engineers as employee #5 and play a crucial role in shaping our product and technical foundation.

This is an end-to-end engineering role where you will take ownership of features from conception to deployment. We're looking for a highly motivated and quality-focused individual who takes pride in their craft.

What You'll Do:

Senior Product Marketing Manager (Category Creation, B2B AI)

Company: Laurel

Location: San Francisco, CA

Employment Type: Full-time

Work Arrangement: Hybrid (Relocation assistance available)

About the Role

Our client, Laurel, is a well-established, highly-funded B2B SaaS company that applies AI to automate timesheets for enterprise legal, accounting, and professional firms. Their platform helps these firms save time, grow profit, and answer vital efficiency questions. They have secured $150 million in total funding.

They are seeking a strategic Senior Product Marketing Manager (PMM) to act as a leader in a crucial phase of growth. This individual will partner directly with the Head of Marketing and CEO to own and drive the company's category creation efforts by defining how they position "AI Time" in the market against legacy timekeeping. This role is ideal for a senior PMM who thrives on building strategy from the ground up in a fast-paced, ambiguous environment.

What You’ll Own

Software Engineer (Founding iOS)

Location: New York, NY or Toronto, ON

Employment Type: Full-time

Work Arrangement: On-site 5 days a week

About the Role

Our client is a well-funded FinTech company with $42 million in total funding, building a modern banking and cash management platform for businesses that sell physical goods. Their mission is to turn banking from a cost center into a profit center by automating financial tasks for consumer brands with sales between $\$5$ million and $\$200$ million. They already serve hundreds of customers that collectively produce over $1 billion in GMV.

They are looking for a Founding iOS Engineer to launch and own the entire mobile experience. This is a critical, high-impact role focused on transforming complex financial data into a simple, beautiful, high-performance iOS application that customers will use daily.

What You'll Do

Full Stack Engineer (AI Defense/Government Contracts)

Location: San Francisco, CA

Employment Type: Full-time

Work Arrangement: On-site 5 days a week

About the Role

Our client is an AI platform redefining how companies interact with the government by matching them to defense contract opportunities they are most likely to win. The company is backed by top defense investors, is profitable, has hit $1M ARR in under 8 months, and is growing at 60% MoM. This mission-driven role focuses on solving critical national security problems.

They are seeking a Full Stack Engineer to be a Founding Engineer for building the core data pipeline and user-facing application. You will own the process of transforming a "firehose" of daily government data into useful, browsable, and interpretable insights for defense companies.

What You'll Do

Full Stack Engineer (AI-Native Compliance)

Location: New York, NY

Employment Type: Full-time

Work Arrangement: On-site 5 days a week

About the Role

Our client is a rapidly growing AI startup building the next-generation compliance platform. Launched in April 2025, they have already crossed $1.2 million ARR with a small team by automating complex security and compliance processes (SOC 2, ISO, HIPAA, GDPR) using AI agents—turning months-long audits into days.

They are looking for a Full Stack Engineer who is hungry, highly technical, and ready to own features from concept to production. As an early engineer, you will work directly with the founders, shape core product decisions, and build the infrastructure necessary to scale the company toward nine figures.

What You'll Do

Member of Technical Staff (Platform Development, Construction Tech)

Location: San Francisco, CA

Employment Type: Full-time

Work Arrangement: On-site 5 days a week

About the Role

Our client is a rapidly scaling construction work efficiency platform, leveraging wearable cameras and cutting-edge AI vision models to analyze on-site productivity. They are tackling the $1.6 trillion annual productivity loss in the construction industry by building tools that help teams save on labor costs and improve safety. The company has secured a $5 million seed round and is scaling rapidly toward its Series A.

They are seeking an exceptional Member of Technical Staff to build and scale core platform features that transform how construction teams manage safety, productivity, and workforce development for their frontline craftworkers. This is a high-impact, hands-on coding role where you'll own critical initiatives.

What You'll Build & Solve

You will be responsible for building complex, scalable workforce management systems and intuitive user interfaces for non-technical users in the field: